function change(imgnum){
	var imgA=document.getElementById("idcontact_thumb1_clh");
	
		if(imgnum==1)
		{
			imgnum=2;
			imgA.src="images/contact_thumb2_clh.jpg";
		}
		else
		{
			imgnum=1;
			imgA.src="images/contact_thumb1_clh.jpg";
		}	
		

}
function start(){
	SetTimeout(change(1),100);
}